package filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpFilter;

/**
 * Servlet Filter implementation class ABCFilter
 */
@WebFilter("/ABCFilter")
public class ABCFilter extends HttpFilter implements Filter {
       
   
    public ABCFilter() {
        super();
        System.out.println("filter 的构造方法被执行");
    }

	public void destroy() {
		System.out.println("filter 的销毁方法被执行");
	}

	
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here
		System.out.println("doFilter 前的代码");
		// pass the request along the filter chain
		chain.doFilter(request, response);
		 System.out.println("doFilter 后的代码");
	}


	public void init(FilterConfig fConfig) throws ServletException {
		System.out.println("filter 的初始化方法");
	}

}
